Robinson annulation on a carbohydrate derivative
Abstract
The reactions of an enolate derived from methyl 4,6-O-benzylidene-3-deoxy-3-C-methyl-α-D-arabino-hexopyranosid-2-ulose have been studied; examples of O-alkylation, C-alkylation and Robinson annulation were observed. In the latter case the structure of the product was confirmed by X-ray crystallography on a crystalline allylic alcohol prepared by reduction of the ketone produced in the reaction.